Thermoluminescence properties and trap kinetics of SmCa4(BO3)3 phosphor

Cin E. A., Bulcar K., Altowyan A. S., Coban M., Kaynar U., Sagban H. M., ...Daha Fazla

Journal of Luminescence, cilt.294, 2026 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 294
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.jlumin.2026.121846
  • Dergi Adı: Journal of Luminescence
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: Anomalous time-dependent enhancement, Radiation dosimetry, SmCa4O(BO3)3 ceramic, Thermoluminescence, Trap kinetics
  • Çukurova Üniversitesi Adresli: Evet

Özet

Undoped SmCa4O(BO3)3 (SCOB) phosphor was synthesized by a microwave-assisted sol–gel combustion method and confirmed as single-phase monoclinic by X-ray diffraction. Thermoluminescence (TL) was measured after β-irradiation up to 500 Gy at a linear heating rate of 2 °C/s between room temperature and 450 °C. The glow curve at 50 Gy shows two main peaks at about 80 °C and 240 °C; after optimized preheating at 180 °C for 10 s, a single dominant peak near 247 °C remains and is used for all further measurements. The main peak shows good reusability over repeated readouts and a wide dose–response range from ∼1 to about 500 Gy without saturation. Kinetic analysis of this peak using variable heating rate, initial rise, and glow-curve deconvolution yields activation energies around 1.6–1.8 eV and frequency factors of ∼1014–1016 s−1, indicating a thermally stable trapping level suitable for dosimetric applications.